Brake equalizer



F. W. WALSH BRAKE EQUALIZER June 3o, 199,1.I

2 Sheets-Sheet v l Filed March 1, 1929 lll lv.:

iLS ll l A. Y I E .INVENTOR ATTORNEY June 30, 1931. F. .w. wALsH- 1,812,184

BRAKE EQUALIZER Filed March .1, 1929 2 Sheets-Sheet 2 il ZZ 742' A Illi" 7 IVENTOR WITNESS: ATTORNEY Patented June 1 9'31r l Vmiam: wALsmor vAircoUvEn-isairisir COLUMBIA, oANADA am montana;

e Appiicuon'niea laren-1,1929, semi No. 343,824.

This invention relates to operating mecha# vvnisms for ,vehicle brakesfanjobject being to l@ wheel and two wheel brakes tov 'insure` an v Aequal-a plicationof all of'tlie brakes. l

- Anot er object ofthe invention is the p rovision ofmeans for automatically adjusting the brake mechanism through the application *1.5 of the brakes, so 'that the latter will alway be pro erly adjusted for use. Wit I the invention further includes the following novel features and details of construction, to 20 be hereinafter mo're fullyv described, illustratedin the accompanying drawings ,and

pointed out in the appended claim. In the drawings Figure 1 is a plan view showing a frag- 25 mentary portion of the frame of an automo- 'bile with the brake equalizing mechanism lin position. y

Figure 2 isa fragmentary view partly in elevation and partly in section showing the 3 automatic brake adjusting means. i

Figure 3 is an enlargedv elevation of the equalizing mechanism for the main rock .sha y Figure 4 is an enlarged fragmentary section 35 taken substantially on the line 1f-tief Fig- 'ure 1.

Figure 5 is a section onA the line 5-5 of Figure 4.

Figure 6 is an enlarged fragmentary ele- 40 vation showing` the mounting and stop for the brake rods. v v Figure 7 is a fragmentary plan vview il lustrating the ap lication of the invention for two wheel bra es.

Referring to the drawings in detail wherein like characters of reference denote corresponding parts, the invention is illustrated in Figure 1 arranged for use with fourv wheel brakes. In this fi re the reference character 5 F indicates a rocl shaft which is mounted the above and other ob'ects in viewv l l lare the hubs 2O of side plates 21 and these.

transversely of the vehicle frame'lO for con# nection with the brakes of the front wheels `lof a vehicle. For this purpose, the shaft F'v is mountedin suitable bearin s 11 carried by the frame landhas 'secure to its" opposite l55l ends arms12.. These arms are connected by means of links 13 withv the brake rods`14 whose opposite ends are suitably connected with the brakes (not shown). Pivotal move' ment of the shaft F in one directionl is lim-y 00 ited by means of stops 15 which vare carried at the lower ends of arms 16. depending from the frame 10.

The shaft F is of sectional formation and' comprises sections 17 and 18, whose adjacent .55 ends have secured thereon beveled gears 19. Mounted for rotation upon the shafts 17 plates are connected by an annular member: 22, which, together with the side plates 21, 7 provides a housing which encloses the gears- 19. The member 22 of this housing carries inwardly extending studs 23'upon which are rotatably mounted gears 24 which engage the gears 19. lThe annular member 22 has 75 extendin circumferentially therearound gear teet 25.

The mechanism just described provides a di'erential gearing which connects the adjacentends of the sections 17 and 18 of the .80

shaft 10,' so that these shaftsections may move relatively for a purpose to be presently understood.

Extending transversely of the frame 10 is a shaft R whichl is mounted in suitable bear- 85, ings carried by the frame 10. These bearings are similar to the bearings 11 just described and the shaft R has secured upon its outer ends arms 26 which are similar to the arms 12.-

These arms 26 like the arms 12 arejsecured to 9 brake rods 27 and these rods are adapted for `connnection with the brakes of the rear wheels of-l the automobile.

, The shaft R is also of sectional formation lThe shaft sections 28 and 29 are therefore 10 teeth 36 and mounted upon the hub 37 of the side plates of this housing is a yoke 38. The yoke is freely rotatable upon the hubs 37 and carries a spring influenced pawl 39 which engages the teeth 36. The yoke 38 is pivotally secured to a link 40 for connection with one end of-a pull rod 41 whose opposite end is adapted for connection with a brake pedal or other operating member. The teeth 36 is also engaged by a take-up pawl 42 which is pivotally mountedas shown at 43. The shaft M has mounted thereon pinions 44 and .45 which engage respectively the gears 25 and 31.

From the foregoing description and accompanying drawings it will be seen that a pull uponthe rod 41 will, through the dog 39 and the teeth.36, rotate the housing of the differential mechanism 35 of the main shaft. Rotation of this shaft will impart rotary movement to the shafts F and R through the pinions 34 and the gears 25 and 31 of their respective differential mechanisms. An equal application of all of the brakes will be thus effected. In the event that too great a movement of the rod 41 is necessary to operatc the brakes, the pawl 42 will take up one or more of the teeth 36 when the mechanism -is operated so that when the brake pedal or other operating members is released and the pawl 39 reaches its neutral position sucient take up adjustment 'will have been effected and the brakes will have been automatically tightened.

The mechanism is equally well adapted for use'with two wheel brakes as shown in Figure 7 of the drawings wherein the brake shaft S is formed of sections 46 and 47 Whose outer ends are connected with the brake. The adjacent ends of the shaft sections are connected by differential mechanism 48 which is similar to the mechanism of the main shaft M and like this mechanism has connection with a pull rod 49. vThis rod is connected with a ratchet mechanism suoli as illustrated in Figure 2 of the drawings so that a pull Y, upon the rod will operate the brakes and pro-v fall Within the scope of the .appended claim.

What I claim is: In a brake equalizing mechanism, a pair of spaced parallel rockshafts adapted to.

have their outer ends connected with the brakes, each shaft including alined sections, dierential mechanism geared to the adjacent ends of the sections of each shaft, and including a housing receiving said sections, a gear arranged exteriorly of each housing, a main operating rock shaft arranged between the first mentioned shafts, relatively small gears carried by the main shaft and meshing with the gears of said housing, said main shaft including alined sections, differential mechanism connecting the adjacent ends of said sections and including a housing receiving said sections, ratchet `teeth arranged exteriorly of the'latter mentioned housing, a yoke supported by said sections and straddling said housing, and including a centrally located depending tubular portion, a spring pressed pawl slidable in said portion and engageable with the ratchet teeth and an operating rod connected with the yoke for operating the latter at a remote point for the purpose specified.

In testimony whereof I affix my signature.

. FRANK W. WALSH.- 

